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Stereoregular poly (beta-alkyl-alpha-methylene gamma-butyrolactone) and copolymer thereof

A methylene and butyrolactone technology, applied in the field of stereoregular poly(β-hydrocarbyl-α-methylene γ-butyrolactone) and its copolymers

Active Publication Date: 2013-09-18
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Coordination polymerization of β-MMBL and copolymerization with γ-MMBL catalyzed by metallocene catalysts or rare earth semi-locene catalysts has not yet been published in patents and literature reports

Method used

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  • Stereoregular poly (beta-alkyl-alpha-methylene gamma-butyrolactone) and copolymer thereof
  • Stereoregular poly (beta-alkyl-alpha-methylene gamma-butyrolactone) and copolymer thereof
  • Stereoregular poly (beta-alkyl-alpha-methylene gamma-butyrolactone) and copolymer thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Vacuum-dry at 120°C for 2 hours, and in a Schlenk bottle replaced with argon three times, add 6 ml of dry dichloromethane, add 23.4 μmol of metallocene catalyst and 23.4 μmol of cocatalyst triphenylcarbenium tetrakis(pentafluorophenyl)boronic acid After stirring for 5 minutes, 1.0 mL (9.37 mmol) of β-hydrocarbyl-α-methylene-γ-butyrolactone was added, and the reaction solution became a gel after a few minutes, and 10 minutes later, a methanol solution containing 5% HCl was added to stop For the reaction, the gel-like reactant was poured into a large amount of methanol, filtered, washed with methanol, and the obtained polymer was vacuum-dried at 50° C. for 12 hours to obtain a solid polymer. The glass transition temperature of the obtained polymer is 270°C-295°C, and the isotacticity is 88-94%.

Embodiment 2

[0041] In Example 1, the polymerization solvent was changed to dry N,N-dimethylformamide, and other operations and conditions were the same as in Example 1. Under the above conditions, β-hydrocarbyl-α-methylene-γ-butyrolactone is polymerized to obtain a homopolymer product. The glass transition temperature of the obtained polymer is 270°C-292°C, and the isotacticity is between 88-94%.

Embodiment 3

[0043] In the first embodiment, the catalyst is changed to a rare earth monocene complex without adding a cocatalyst boron compound, and other operations and conditions are the same as in the first embodiment. Under the above conditions, β-hydrocarbyl-α-methylene-γ-butyrolactone is polymerized to obtain a homopolymer product. The glass transition temperature of the obtained polymer is 270°C-292°C, and the isotacticity is between 88-94%.

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Abstract

The invention relates to a polymer and a copolymer which are high in stereoregularity, high in vitrification conversion temperature and general organic solvent resistant, and particularly relates to a beta-alkyl-alpha-methylene gamma-butyrolactone homopolymer and a copolymer of beta-alkyl-alpha-methylene gamma-butyrolactone. The invention further relates to a preparation method of the polymer, and the polymer can replace materials such as poly(methyl methacrylate) in some application fields.

Description

Technical field: [0001] The invention relates to a homopolymer and a copolymer with structural analogue monomers obtained by catalyzing the polymerization of β-alkyl-α-methylene γ-butyrolactone with metallocene and semi-rare-earth compound catalysts and a preparation method. Background technique: [0002] Polymethyl methacrylate (PMMA) derived from petroleum products is an important thermoplastic, which is widely used because of its good transparency, chemical stability, weather resistance, and easy processing and dyeing. But there are also some obvious defects, such as low surface hardness, no scratch resistance, fogging on the surface, poor toughness, low impact strength, low heat resistance temperature, etc. To this end, DuPont researchers are studying the polymerization of α-methylene-γ-butyrolactone (MBL), a structural analogue of methyl methacrylate, in order to obtain materials with better performance. α-methylene-γ-butyrolactone, also known as tulipolactone or shanz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F124/00C08F224/00C08F4/6592C08F4/52
Inventor 胡扬剑李元祥吴峰毛新平
Owner HUAIHUA UNIV